US3819787A
Expired / Lapsed
US
⏱️ 0.0 years remaining
Method of producing a pair of silicon
Assignee: ZF International UK Ltd
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Filing: 1971-07-29
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Granted: 1974-06-25
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Expires: 1991-07-29
Abstract
Abstract A METHOD OF PRODUCING A PLURALITY OF INTERCONNECTED SILICON NITRIDE PARTS COMPRISES THE STEPS OF STARTING WITH A FIRST SILICON NITRIDE PART, PROVIDING ON SAID FIRST PART A MIXTURE OF SILICON NITRIDE, WHICH IS SUBSTANTIALLY IN THE A-PHASE, AND UP TO 25% BY WEIGHT OF A FLUXING AGENT, AND HOT PRESSING THE MIXTURE OF SILICON NITRIDE AND THE FLUXING AGENT ONTO THE FIRST PART SO AS TO PRODUCE A SECOND, HOT PRESSED SILICON NITRIDE PART INTERCONNECTED WITH THE FIRST PART.
Inventors
- 👤 R Coe
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-10-27 04:02
CPC Classifications
C; C04; C04B; C04B35/00; C04B35/515; C04B35/58; C04B35/584; C04B35/593
Claims Analysis
Total Claims: 0
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References Cited (Backward Citations)
No citation records indexed.
USPTO Annuity & Maintenance Windows
| Annuity Stage | Window Opens | Payment Deadline | Surcharge Period Until | Estimated Fee | Status |
|---|---|---|---|---|---|
| 3.5 Years (Year 4) | 1977-06-24 | 1977-12-24 | 1978-06-25 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1981-06-24 | 1981-12-24 | 1982-06-25 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1985-06-24 | 1985-12-24 | 1986-06-25 | $7700.00 | Window Closed / Lapsed |